Soyedina alexandria Grubbs, 2006

Grubbs, Scott A. & Baumann, Richard W., 2023, The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic, Zootaxa 5306 (1), pp. 1-53 : 32-33

14. Soyedina alexandria Grubbs, 2006

Cumberland Forestfly

http://lsid.speciesfile.org/urn:lsid:Plecoptera.speciesfile.org:TaxonName:6058

( Figs. 99–104 )

Soyedina alexandria Grubbs 2006:43 . Holotype male (Illinois Natural History Survey ), spring into Pinewood Branch , Leipers Fork West Harpeth River, 4 km W Leipers Fork, Williamson Co., Tennessee, USA

Soyedina alexandria Grubbs & Baumann, 2019:225

Distribution. USA: AL, MS, TN ( DeWalt et al. 2022)

Male. Macropterous. Body length 5.3–5.7 mm, forewing length 7.2–7.6 mm (n = 4). Gills absent. Cerci simple and unmodified. Paraprocts with two lobes, inner lobes lightly sclerotized and inconspicuous, outer lobes sclerotized, in basal half bulbous, slightly tapered apically, straight or slightly convex along dorsal margin ( Fig. 103 ). Epiproct asymmetric, typical for genus ( Fig. 99 ); ventral sclerites partially recurved over abdomen, distinctly asymmetric, apically narrowly triangular ( Fig. 99 ); dorsal sclerites distinctly asymmetric, appearing scaly at higher magnifications ( Figs. 100‒102 ); open apically, inner member heavily sclerotized, flanged apically, lip asymmetric with apical half longer than basal portion ( Figs. 100‒101 ).

Female. Macropterous. Body length 5.4–6.0 mm, forewing length 8.7–9.6 mm (n = 6). Gills absent. Cerci simple and unmodified. Subgenital plate well-developed, subtriangular in shape; base broad, extending from posterior of seventh sternum entirely over eighth sternum and approximately ¼ over ninth sternum; terminating in broadly-rounded apex ( Fig. 104 ).

Larva. Undescribed.

Comments. Soyedina alexandria is currently known only along a narrow latitudinal and longitudinal band from middle Tennessee south to the Cumberland Plateau region in northwestern Alabama westward to northern Mississippi ( Grubbs & Baumann 2019).

Figures

FIGURES 99‒104. Soyedina alexandria. 99, USA, Tennessee, tributary to Harpeth River, epiproct, ventral view; 100, USA, Tennessee, tributary to Harpeth River, epiproct apex, ventral view; 101, USA, Tennessee, tributary to Harpeth River, epiproct, lateral view; 102, USA, Alabama, spring into East Fork Scarce Grease Branch, epiproct, caudal view; 103, USA,Alabama, spring into East Fork Scarce Grease Branch, outer paraproct lobe, lateral view; 104, USA, Alabama, spring into Larkin Fork, female abdominal terminalia, ventral view. ds = dorsal sclerite, im = inner member, opl = outer paraproct lobe, vs = ventral sclerite.